Before looking at the motorhome fittings, It's a 20 year old chassis with possibly 20 year old components (brakes, hubs, suspension etc). Possible rust on major structural components underneath.
First port of call is to check the MOT history online to see what has been picked up on over the years and what if anything has been replaced.
You should get a feeling off the seller if its been loved with no expense spared. A nice wedge of paperwork, receipts, invoices etc is always welcome.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.